1. Intra-city mobility and characterization in a fastgrowing city of Lagos, NigeriaSimeon Oluwagbenga Fasina, Ayobami Ademola Akanmu, Umar Obafemi Salisu, Samuel Adetunji Okunubi, 2020, original scientific article Abstract: Effective urban transportation no doubt serves as engine room and catalyst for driving national economic development. Significantly, the purpose of urban transport is to provide both passenger and freight mobility over specific parts of urban areas including cities, and its efficiency is characterized upon transporting effectively and achieving economies of scale. Hence, this study examined intra-city mobility and characterization in Lagos, Nigeria. The data was sourced from both primary and secondary sources. Primary data detailed the use of two sets of questionnaires administered to commuters and motorists. 182 copies of questionnaire were randomly administered to commuters, while 60 units of the questionnaire were purposively and conveniently administered to motorists. Descriptive and inferential techniques were used for data analysis. Major findings revealed obvious variations in socio-economic parameters of intra-city trip makers and factors influencing trip making. It was observed that journey to work, school, shopping cum business constituted the major trips characterizing in Lagos. Findings also revealed that high patronage priority was given to most used and preferred means due to vehicle travel speed, trip purpose, and availability than safety and comfortability of modal choice. Regression analysis result revealed that commuters’ modal choice and patronage is statistically influenced by operational attributes of mode (e.g. transit time, delay duration, safety, vehicle condition and transit fare etc.) at Sig. p=0.000 and F14165 15.667 which is greater than table value at 5% significant level. The study recommended among others the formulation and implementation of effective policy for urban transport activities; standardization of service operations and expansion of infrastructural facilities including the last-mile in the city.
Keywords: urban mobility, transportation, mobility index, Lagos
Published in DKUM: 22.08.2024; Views: 81; Downloads: 8
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2. Bike sharing and cable car demand forecasting using machine learning and deep learning multivariate time series approachesCésar Peláez-Rodriguez, Jorge Pérez-Aracil, Dušan Fister, Ricardo Torres- López, Sancho Salcedo-Sanz, 2024, original scientific article Keywords: cities green mobility, bike sharing demand prediction, cable car demand prediction, machine learning, deep learning
Published in DKUM: 22.08.2024; Views: 76; Downloads: 5
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3. Synthesis and study of fully biodegradable composites based on poly(butylene succinate) and biocharKaterina Papadopoulou, Panagiotis A. Klonos, Apostolos Kyritsis, Ondřej Mašek, Christian Wurzer, Konstantinos Tsachouridis, Antonios D. Anastasiou, Dimitrios Bikiaris, 2023, original scientific article Keywords: poly(butylene succinate), biochar, biocomposites, thermal properties, thermal conductivity, molecular mobility, mechanical properties, enzymatic hydrolysis
Published in DKUM: 10.04.2024; Views: 200; Downloads: 9
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4. A rational design of isoindigo-based conjugated microporous n-type semiconductors for high electron mobility and conductivityKayaramkodath C. Ranjeesh, Ayman Rezk, Jose Ignacio Martinez, Safa Gaber, Areej Merhi, Tina Škorjanc, Matjaž Finšgar, Gisha Elizabeth Luckachan, Ali Trabolsi, Bilal R. Kaafarani, 2023, original scientific article Abstract: The development of n-type organic semiconductors has evolved significantly slower in comparison to that of p-type organic semiconductors mainly due to the lack of electron-deficient building blocks with stability and processability. However, to realize a variety of organic optoelectronic devices, high-performance n-type polymer semiconductors are essential. Herein, conjugated microporous polymers (CMPs) comprising isoindigo acceptor units linked to benzene or pyrene donor units (BI and PI) showing n-type semiconducting behavior are reported. In addition, considering the challenges of deposition of a continuous and homogeneous thin film of CMPs for accurate Hall measurements, a plasma-assisted fabrication technique is developed to yield uniform thin films. The fully conjugated 2D networks in PI- and BI-CMP films display high electron mobility of 6.6 and 3.5 cm2 V−1 s−1, respectively. The higher carrier concentration in PI results in high conductivity (5.3 mS cm−1). Both experimental and computational studies are adequately combined to investigate structure–property relations for this intriguing class of materials in the context of organic electronics.
Keywords: conjugated microporous polymers, isoindigo, semiconductors, conductivity, electron mobility
Published in DKUM: 03.04.2024; Views: 219; Downloads: 12
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5. Suggestions and solutions for enhancing active commuting to the University of Maribor and advancing ▫$CO_2$▫ emission reductionBeno Mesarec, Branka Trček, 2024, original scientific article Abstract: This study investigated commuting behavior at four technical faculties (BCTF) in Maribor. The main aim was to provide suggestions and solutions for challenges related to active commuting to the BCTF, while promoting advancements in CO2 emission reduction. The research methodology was based on analyses of a questionnaire survey and calculations of CO2 emissions. The results indicate that implementing measures to promote walking, bicycling and the use of city and regional public transport, in conjunction with supportive housing and parking policies, has the potential to eliminate car trips within 0–1 km of the BCTF and reduce car trips from other zones in favor of active commuting by 30% to 50%. These proposed transport scenarios could lead to an annual reduction in CO2 emissions ranging from 17% to 29%. The greatest potential for CO2 savings is observed within 0–5 km of the BCTF, where a shift to walking and bicycling could reduce emissions by up to 44%. The results also highlighted a notable disparity, indicating that students with term-time accommodations emitted 3.5 times and 4.1 times less annual CO2 within 0–5 km of the BCTF compared to students and staff commuting daily from their permanent residences in the city.
Keywords: university, travel behavior, modal choice, active mobility, CO2 emissions
Published in DKUM: 30.01.2024; Views: 361; Downloads: 24
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6. Suggestions and solutions for enhancing active commuting to the University of Maribor and advancing ▫$CO_2$▫ emission reductionBeno Mesarec, Branka Trček, 2024, original scientific article Abstract: This study investigated commuting behavior at four technical faculties (BCTF) in Maribor. The main aim was to provide suggestions and solutions for challenges related to active commuting to the BCTF, while promoting advancements in CO2 emission reduction. The research methodology was based on analyses of a questionnaire survey and calculations of CO2 emissions. The results indicate that implementing measures to promote walking, bicycling and the use of city and regional public transport, in conjunction with supportive housing and parking policies, has the potential to eliminate car trips within 0–1 km of the BCTF and reduce car trips from other zones in favor of active commuting by 30% to 50%. These proposed transport scenarios could lead to an annual reduction in CO2 emissions ranging from 17% to 29%. The greatest potential for CO2 savings is observed within 0–5 km of the BCTF, where a shift to walking and bicycling could reduce emissions by up to 44%. The results also highlighted a notable disparity, indicating that students with term-time accommodations emitted 3.5 times and 4.1 times less annual CO2 within 0–5 km of the BCTF compared to students and staff commuting daily from their permanent residences in the city.
Keywords: university, travel behavior, modal choice, active mobility, CO2 emissions
Published in DKUM: 30.01.2024; Views: 279; Downloads: 0 |
7. Erasmus+ mobility : empirical insights into Erasmus+ tourists' behaviourMiha Lesjak, Emil Juvan, Eva Podovšovnik, 2020, original scientific article Abstract: Erasmus+ students represent a large sub-segment of educational tourists, making this segment an attractive market for universities as well as destination marketing organisations. Unfortunately, very little is known about Erasmus+ students' travel behaviour; hence the present study aims at extending empirically supported knowledge about travel behaviour of students during their Erasmus+ mobility. Data was collected via an online survey among all Erasmus+ enrolling students in the academic year 2016/17 in Slovenia. The results show that 93% of the participants travelled during theirmobility. The level of studies aswell as gender affect students' travel behaviour, making the two characteristics immediately useful attributes when targeting Erasmus+ travellers. Based on perceived destination attributes, male students predominantly seek cities with attractive nightlife but female students look for easily accessible cities, which are safe and offer attractive cultural sites. These findings suggest that tourism providers, destination tourism organisations and universities should work hand in hand when designing personalised tourism experiences and their promotion among Erasmus+ students. This is crucial during the phase of planning Erasmus+ mobility, when students choose their destination and host university, as well as during students' Erasmus+ mobility, because Erasmus + students travel during their student mobility.
Keywords: Erasmus+ mobility, education, international students, destination attributes, tourist behaviour
Published in DKUM: 26.01.2024; Views: 277; Downloads: 17
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8. The external bias-dependent electric field at hole-injecting electrode/[alpha]-NPD junction and its relationship to Gaussian disordered interface statesBruno Cvikl, 2019, original scientific article Abstract: An alternative interpretation of two different sets of published temperature-dependent current-voltage a-NPD (i.e. N,N'-Di(1-naphthyl)-N,N'-diphenyl-(1,11-biphenyl)-4,4'-diamine) organic semiconductor data is presented. The measurements are described in terms of the hole drift current density expressed with two parameters: the electric field at the hole-injecting interface, Eint, and, ?max, the hole mobility determined by the measured current density at the maximum value of the externally applied electric field, Ea, in a given experiment. The former parameter, depending on the contact résistance, may be a function of Ea but the latter is Ea independent, The fixed value of Eint signifies the occurrence of the space charge limited current, SCLC, within the electrode/a-NPD structures and the contact is ohmic. Then, the calculated weak bias-dependent hole drift mobility, a function of Eint, equals the well%known exponential bias-dependent mobility, and saturates. The data not displaying SCLC characteristics are used for the calculation of Eint dependence on the applied field, Ea. It is shown that the quasi-ohmic contacts cause Eint to become a strong double-valued function of the externally applied electric field, Ea, described in terms of the distorted, inverted, high order parabola. The corresponding bias-dependent hole drift mobility is non-exponential and evolves on a considerably lower level than in SCLC cases. It is found that a sufficiently increased Ea alters the quasi-ohmic contact/a-NPD region into the ohmic one. A simple model of a thin, net hole charged, electrode/a-NPD interface enables the relationship between the deduced interfacial electric field, Eint, and the Ea dependent Gaussian width, as well as the energy shift of its peak along the negative binding energy is to be investigated. The currentvoltage method appears to be a helpful expedient for the investigation of the electric field at hole-injecting electrode/organic interfaces.
Keywords: electrode/organic electric field, contact affected hole mobility, organic interface disorder parameters
Published in DKUM: 22.12.2023; Views: 572; Downloads: 7
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9. Early spread of COVID-19 in Romania: imported cases from Italy and human-to-human transmission networksMarian-Gabriel Hâncean, Matjaž Perc, Jürgen Lerner, 2020, original scientific article Abstract: We describe the early spread of the novel coronavirus (COVID-19) and the first human-to-human transmission networks, in Romania. We profiled the first 147 cases referring to sex, age, place of residence, probable country of infection, return day to Romania, COVID-19 confirmation date and the probable modes of COVID-19 transmissions. Also, we analysed human-to-human transmission networks and explored their structural features and time dynamics. In Romania, local cycles of transmission were preceded by imported cases, predominantly from Italy. We observed an average of 4.8 days (s.d. = 4.0) between the arrival to a Romanian county and COVID-19 confirmation. Furthermore, among the first 147 COVID-19 patients, 88 were imported cases (64 carriers from Italy), 54 were domestic cases, while for five cases the source of infection was unknown. The early human-to-human transmission networks illustrated a limited geographical dispersion, the presence of super-spreaders and the risk of COVID-19 nosocomial infections. COVID-19 occurred in Romania through case importation from Italy. The largest share of the Romanian diaspora is concentrated especially in the northern parts of Italy, heavily affected by COVID-19. Human mobility (including migration) accounts for the COVID-19 transmission and it should be given consideration while tailoring prevention measures.
Keywords: coronavirus, COVID-19, transmission networks, human mobility, migration, nosocomial infections
Published in DKUM: 16.12.2020; Views: 903; Downloads: 205
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10. The development of sustainable mobility plan (SUMP), example for city of Sinj, CroatiaAnđelo Marunica, 2019, master's thesis Abstract: SUMP (Sustainable Urban Mobility Plan) is an innovative way of planning urban traffic in order to meet the needs of citizens in a sustainable way. Unlike the traditional approach to traffic planning, SUMP places a special emphasis on citizen and other stakeholders involvement and participation, in which different decisions regarding various sectors such as traffic, spatial planning, economic development, social activities, health, safety, energy, etc. are coordinated . The SUMP concept for the city of Sinj proposes 30 measures compiled in 6 themed packages, which are expected to greatly improve the quality of traffic in the city, in addition to reducing air pollution and improving the quality of life for residents of Sinj, while simultaneously, to a certain extent, stimulating economic growth and reversing demographic decline which is currently affecting the municipality of Sinj.
Keywords: SUMP, city of Sinj, sustainable mobility plan, sustainable mobility, sustainable mobility planning methodology
Published in DKUM: 23.09.2019; Views: 1168; Downloads: 105
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